"She said that if she didn't come back from an overseas trip, that John had probably killed her or organised for her to be killed and for me to go to the police if she didn't come back, if I didn't see her," he said.

She didn't ever raise that concern with him again after she returned from the trip.

Mr Liscombe said there were erratic scenes outside the family's Upper Coomera home the day after Chardon told one if his wife's friends that she had come home angry, packed her bags and vanished.